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  • One-Pot Synthesis of Monodisperse Noble Metal @ Resorcinol-Formaldehyde (M@RF) and M@Carbon Core-Shell Nanostructure and Their Catalytic Applications.

One-Pot Synthesis of Monodisperse Noble Metal @ Resorcinol-Formaldehyde (M@RF) and M@Carbon Core-Shell Nanostructure and Their Catalytic Applications.

Langmuir : the ACS journal of surfaces and colloids (2015-10-06)
Peipei Yang, Yong Xu, Lei Chen, Xuchun Wang, Qiao Zhang
RESUMEN

We demonstrate that noble metal @ RF core-shell nanostructures can be obtained through a facile one-pot synthesis approach in the absence of any additional surfactants. Monodisperse metal@RF core-shell nanostructures can be produced within 1 h on a large scale. Both the core size and shell thickness can be readily tuned by altering the reaction parameters. Systematic studies reveal that resorcinol could have several functions: it could act as a reactant to form RF resin, and it also could passivate the surface of metallic nanoparticles to prevent them from aggregating. Additionally, for the first time, our results suggest that resorcinol may act as a reducing agent that can reduce metal salts to form metal nanoparticles. The core-shell nanoparticles can be carbonized into M@carbon nanostructures, which have shown great performance in the catalytic hydrogenation of chlorobenzene. This work not only will help to achieve the controllable synthesis of noble metal@RF resin and M@carbon core-shell nanostructures but also will promote research into other RF-based nanostructures and their catalytic applications.

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Sigma-Aldrich
Chlorobenzene, puriss. p.a., ACS reagent, ≥99.5% (GC)
Sigma-Aldrich
Chlorobenzene, ACS reagent, ≥99.5%
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Formaldehyde-12C solution, 20% in H2O, 99.9 atom % 12C
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Resorcinol, BioXtra, ≥99%
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Formaldehyde solution, for molecular biology, 36.5-38% in H2O
Supelco
Formaldehyde solution, stabilized with methanol, ~37 wt. % in H2O, certified reference material
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Rhein
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Rhein, technical grade
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Resorcinol, ACS reagent, ≥99.0%
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Chlorobenzene, anhydrous, 99.8%
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Resorcinol, ReagentPlus®, 99%
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Sodium borohydride solution, ~12 wt. % in 14 M NaOH
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Formaldehyde solution, ACS reagent, 37 wt. % in H2O, contains 10-15% Methanol as stabilizer (to prevent polymerization)
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Resorcinol, meets analytical specification of Ph. Eur., BP, 98.5-100.5% (calc. to the dried substance)
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Resorcinol, ≥98%, FG
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Sodium borohydride solution, 0.5 M in 2-methoxyethyl ether
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Sodium borohydride solution, 2.0 M in triethylene glycol dimethyl ether
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Formaldehyde solution, meets analytical specification of USP, ≥34.5 wt. %
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Formaldehyde solution, for molecular biology, BioReagent, ≥36.0% in H2O (T)
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Chlorobenzene, ReagentPlus®, 99%
SAFC
Formaldehyde solution, contains 10-15% methanol as stabilizer, 37 wt. % in H2O
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VenPure® SF, powder
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Sodium borohydride, granular, 99.99% trace metals basis
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Sodium borohydride, powder, ≥98.0%
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Sodium borohydride, ReagentPlus®, 99%
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Sodium borohydride, caplets (18 × 10 × 8 mm), 98%
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Sodium borohydride, granular, 10-40 mesh, 98%
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Sodium borohydride, 90% NaBH4 basis, pellets, diam. 8 mm, Cobalt (Doped)
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Sodium borohydride, purum p.a., ≥96% (gas-volumetric)
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Sodium borohydride, hydrogen-storage grade, 98%